Auto-rebaseline for r176700

LayoutTests/fast/repaint/background-resize-height-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
-        [8, 8, 600, 550],
-        [8, 8, 600, 500]
+        [8, 508, 600, 50]
       ],
       "children": [
         {
           "position": [8, 8],
           "bounds": [60, 44],
           "drawsContent": true,
           "backfaceVisibility": "hidden",
           "repaintRects": []
         },
         {
@@ skipping 192 matching lines @@
           "repaintRects": [
             [0, 0, 60, 40],
             [0, 0, 60, 40]
           ]
         }
       ]
     }
   ]
 }